EurekaMag.com logo
+ Site Statistics
References:
48,253,228
Abstracts:
22,798,842
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Identification of a nonpathogenic Erwinia amylovora guaB mutant


, : Identification of a nonpathogenic Erwinia amylovora guaB mutant. Plant Pathology (Oxford) 46(4): 594-599

A nonpathogenic Erwinia amylovora transposon mutant that has an insertion in the guaB gene was isolated. The mutation results in a nutritional requirement for guanine or xanthine, and loss of ability to produce ooze on immature pear fruit and to cause symptoms in the apple seedling assay. The mutant expressed other known virulence determinants including extracellular polysaccharide and had an intact hrp/dsp cluster. In addition it was able to grow in host tissue, although the population size in planta was maintained at a considerably lower level than that seen with the parent strain. The inability of the Erwinia amylovora guaB mutant to cause disease indicates that levels of guanine in plant tissue are likely to be insufficient to maintain optimal growth via the purine salvage pathway. This, in turn, appears to compromise the ability of the mutant to develop a sufficiently large population size in planta to overcome host defence mechanisms and cause disease symptoms. This indicates that a functional de novo guanine synthetic pathway is important for Erwinia amylovora to grow on plant tissue and cause disease.

Order PDF Full Text

Close
Close

Click here to order any other PDF Full Text


Accession: 002863203

DOI: 10.1046/j.1365-3059.1997.d01-49.x

PDF Full Text: Identification of a nonpathogenic Erwinia amylovora guaB mutant


Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:
Close
Close

Other references

Deng, H.Z.; Sun, S.Y.; Li, S.Y., 1994: An experimental observation on the analgesic and antipyretic effects and toxicity of Acanthopanax giraldii Harms. Experimental data indicate that EtOH extract of Acanthopanax giraldii (EAGH) has pronounced analgesic action and reduces not only high temperature induced by proteinic jelly, but also normal body temperature in rabbits. However, no effect was obse...

Tian ChengYu; L.C.unYing; Zhao ChunJian; Z.Y.anGang, 2007: The fertilization and proembryo choose of Pinus sylvestris var. mongolica. The fertilization was processed by sperm in mature male gametophyte combining with egg cell on the top of archegonia on June 15 or so. Then fertilized egg made division of free nuclei and cell wall was began to form while 8 daughter nucleus formi...

Campfield, L.A.; Smith, F.J.; Guisez, Y.; Devos, R.; Burn, P., 1996: OB protein: A peripheral signal linking adiposity and central neural networks. Appetite 26(3): 302-302

Buchholz, T.A., 2003: Lung carcinoma development after radiotherapy for breast carcinoma. Cancer 98(7): 1331-1333

Makedonov, AV.; Tolstikova, NV.; Krivulina, YuA.; Golovenok, OM.; Aleksandri-Sadova, TA.; Ivanova, I-NV., 1979: Recent thanatocoenoses of molluscs in some coastal environment of the coast of the Baltic Sea and lakes of the Karelsky isthmus. Unknown

Potestio, R.; Español, P.; Delgado-Buscalioni, R.; Everaers, R.; Kremer, K.; Donadio, D., 2013: Monte carlo adaptive resolution simulation of multicomponent molecular liquids. Complex soft matter systems can be efficiently studied with the help of adaptive resolution simulation methods, concurrently employing two levels of resolution in different regions of the simulation domain. The nonmatching properties of high- and...

Wen Chung, Pel, 1963: Quaternary mammals from the Liucheng Gigantopithecus cave and other caves of Kwangs-. Since 1949, studies of vertebrate palaeontology have made rapid progress. From many new localities in the provinces south of the Yangtze, Quaternary fossil mammals have been collected. Some general ideas relating to the Quaternary mammalian fauna...

Doeksen, G.A.; Kuehn, J.; Schmidt, J., 1973: Consequences of decline and community economic adjustment to it. An important part of the economic setting in the Great Plains is agriculture. Despite a decrease in the total number of farms from 1,640,000 in 1940 to 605,000 in 1970, the percentage of US value of crops produced there increased from 17.8 per cen...

Koudelková, M.; Vinsová, H.; Jedináková-Krízová, V., 2003: Isotachophoretic determination of stability constants of Ho and Y complexes with diethylenetriaminepentaacetic acid and 1,4,7,10-tetraazadodecane-N,N',N'',N'''-tetraacetic acid. The method of capillary isotachophoresis with conductivity detection was applied for the determination of the physico-chemical characteristics (conditional stability constants log beta') of holmium and yttrium complexes with DTPA (diethylenet...

Taylor D. J., 1971: Foraminifera and the Cretaceous and Tertiary depositional history in the Otway Basin in Victoria. Biostratigraphy, depositional environment, paleogeography.